Ultimachelium, Lowry & Stoddart, 2012

Lowry, J. K. & Stoddart, H. E., 2012, The Pachynidae fam. nov. (Crustacea: Amphipoda: Lysianassoidea) 3246, Zootaxa 3246 (1), pp. 1-69 : 62

publication ID

https://doi.org/ 10.11646/zootaxa.3246.1.1

DOI

https://doi.org/10.5281/zenodo.5251324

persistent identifier

https://treatment.plazi.org/id/456087D3-3618-FFB4-B8DF-0DADFA1448D9

treatment provided by

Felipe

scientific name

Ultimachelium
status

 

Key to species of Ultimachelium View in CoL

1. Pereopod 7 basis with subquadrate posterodistal corner....................................................... 2

- Pereopod 7 basis with rounded posterodistal corner.......................................................... 3

2. Gnathopod 1 ischium smaller than propodus; merus with short anterior margin. Pereopod 7 merus, length of anterior margin about 2.5 × proximal breadth................................................................... U. nichollsi View in CoL

- Gnathopod 1 ischium subequal to propodus; merus without anterior margin. Pereopod 7 merus, length of anterior margin about 1.5 × proximal breadth........................................................................ U. barnardi View in CoL

3. Mandibular palp article 2 as long as article 3. Gnathopod 1 ischium larger than propodus................ U. schellenbergi View in CoL

- Mandibular palp article 2 longer than article 3. Gnathopod 1 ischium subequal to propodus...................... U. tac View in CoL

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Amphipoda

Family

Pakynidae

Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF